At
major bookstores such as Barnes & Noble, Asia Books, National
Bookstores, P T Gramedia, Kinokuniya Bukindo as well other bookstores. If the store
is out of stock, ask them to order the book for you.

Through
gemological associations such as the Canadian Gemmological
Association, the Gemmological Association of Australia,
the Gemological
Institute of America, and
Gem-A (the Gemmological
Association of Great Britain), which is a convenient
source if you live in Europe, Africa or the Middle East.